Damper



J. [ANDY.

DAMPER.

APPLICATION FILED IUNE H, 1920.

1,861,782. I I Patented Dec; 7,1920.

2 SHEETS-SHEET I- INVENTOR- J0/m, Tandy;

A TTORNEVS WITNESSES ama e- J. TANDY.

v DAMPER. APPLICATION FILED JUNE 11, I920- Patented Dec. 7, 1920.

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WITNESSES A TTORNEYS UNITED STATES JOHN TANDY, 0F BUTTE, MONTANA.

' DAMPER.

Specification of Letters Patent.

Patented Dec. 7, 1920.

Applicationfiled June 11, 1920. Serial No. 388,134.

To all whom it may concern:

Be it known that I, JOHN TANDY, a citizen of the United States, and a resident of Butte, in the county of Silverbow and State of Montana, have invented certain new and useful Improvements in Dampers, of which the following is a specification.

My inventionis an improvement in dampers, and has for its object to provide a device of the character specified, adapted for use in fireplaces, to control the draft, wherein a housing or frameis provided of a size to register with the opening of the flue, and shaped to conform with the proper arrangement at the junction of the fireplace and flue, and having a damper capable of being operated from outside the flue for regulating the draft through'the flue.

In the drawings v Figure 1 is a front view of the fireplace with parts'broken away to show the housing for the throat of the fireplace,

Fig. 2 is a horizontal section above the housing,

Fig. 3 is a front view of the damper,

Fig. 4 is a side view of the fireplace with parts broken away to show the side of the housing,

Fi 5 is a vertical section through the housing and damper,

Fig. 6 is a front view of the rear wall of the housing, also showing plan of sootshelf 6,

Fig. 7 is a front view of the controlling rod for the damper, r Fig. 8 is a vertical section through the damper and soot shelf, part of drawing showing angle only, see Fig. 6.

The present embodiment of the invention is shown in connection with a fireplace of usual construction, having the opening or combustion chamber 1 and the flue 2' with which the combustion chamber communicates, the said fireplace and flue being constructed of brick in the usual manner. The rear wall 3 of the fireplace is curved upwardly and forwardly, and there is a soot shelf 4 at the top of this wall, the wall being inclined forwardly in front of the flue 2.

The front of the top of the wall 3 is a little forward with respect to the front wall of the flue, and there is provided a throat at this point between the flue and the fireplace.

The housing for the throat consists of an inclined front wall 5, a vertical rear wall 6,

'5 and a portion 7 of the end walls extend below the soot shelf, and a damper plate :Lndlcated at 9 is arrangedin such position that when closed, its lower edge rests upon the bottom 8 of the housing, at the forward edge of the soot shelf, its upper edge engagmg the inclined front wall 5 and its ends engaging the portions 7 of the end walls.

In orderto control thedamper, a threaded rod 10 is mounted in the masonry, its rear' 'end being journaled in one of a series of openings 11' in the rear wall 6 of the housing, and this rod has a knob or handle 12 at its forward end for convenience in manipulating the same.

As clearly shown in Fig. 5, the rod is engaged by a nut 13 behind the wall 6 of the housing, and the rod is thus free to rotate with respect to the masonry and housing. A nut 14 is mounted on the threaded portion of the rod, and a rod 15 is hinged to the nut, the nut having a depending lug 16 which is received between the arms of a fork 17 on the rod, and a rivet 18 pivotally connects the parts.

This rod 15 extends through a sheath 19 on the damper 9 integral therewith, the lower end of the rod normally extending below the soot shelf as shown in Figs. 5 and 6. The upper edge of the damper is slotted vertically as shown at 20, to'permit the passage of the threaded rod 10.

In operation, when it is desired to open the damper from the position shown in Fig. 5, the rod is turned in the proper direction to move the nut 14 rearwardly, as

indicated in dotted lines in Fig. 5. The

is of such length that it cannot become disengaged from the damper at any time whatever the position of the damper. The front wall 5 is slotted for the rod as shown at 21, and the lower edge of this wall rests upon the angle plate 22 which supports the arch of the fireplace or superimposed masonry.

With the improved damper, the mason is not limited to an exact point in placing the rod 10. The slot 21 and the series of open- ,part of the bolt which is directly in lower part of the throat, and this part cannot be harmed. The housing provides .aform on "which the brick work can be built properly, instead of the usual horizontal 'corbeling which causes smoke to enter the room from the front opening. The housing also provides a smoothlining and is fire-proof. The

horizontal soot shelf acts as a down-draft check, and is indispensable in fireplace construction, although seldombuilt. The housing forces the mason to provide the shelf.

Referring to Fig. 6, it will be seen that the .back of the housing is paneled. Re-

ierring to Fig. 3, it will be seen that the damper is hinged at 23 at its lower edge.

'I claim 1. In a fireplace, the combination with-the fireplace, the flue, and the throat connecting the fireplace and the flue, of a housing shaped to fit the throat and provided with a soot shelf, a damper, and means operable outside of the flue for moving said damper into vertical position transversely of the throat, or into inclined position to leave the throat open, said means comprising a threaded rod journaled in the housing, the housing having means for supporting the rod at diiferentheights, the damper having a: socket inclined with respect to the plane of the damper, a slidable rod engaging the socket and extending below the damper, and a nut threaded onto the first named rod and hinged to the upper end of the last named rod. i

2. In a fireplace, a housingshaped to fit within the throat of the flue, a damper hinged to the housing to close the same 'or to permit :free passage of the heated gases through the housing, .andmeans for operating said damper from outside the flue, said means comprising a rod, slidably connected with the damper, a threaded rod journaled transversely of the housing and having a nut movable thereon when the rod is turned, said rod being hinged to the nut,'the damper having a socket through which the rod is slidable, the rod fitting the socket to constrain the damper to swing as the rod is swung by the movement of the nut on the threaded rod.

JOHN TANDY. 

